00001 // 00002 // ******************************************************************** 00003 // * License and Disclaimer * 00004 // * * 00005 // * The Geant4 software is copyright of the Copyright Holders of * 00006 // * the Geant4 Collaboration. It is provided under the terms and * 00007 // * conditions of the Geant4 Software License, included in the file * 00008 // * LICENSE and available at http://cern.ch/geant4/license . These * 00009 // * include a list of copyright holders. * 00010 // * * 00011 // * Neither the authors of this software system, nor their employing * 00012 // * institutes,nor the agencies providing financial support for this * 00013 // * work make any representation or warranty, express or implied, * 00014 // * regarding this software system or assume any liability for its * 00015 // * use. Please see the license in the file LICENSE and URL above * 00016 // * for the full disclaimer and the limitation of liability. * 00017 // * * 00018 // * This code implementation is the result of the scientific and * 00019 // * technical work of the GEANT4 collaboration. * 00020 // * By using, copying, modifying or distributing the software (or * 00021 // * any work based on the software) you agree to acknowledge its * 00022 // * use in resulting scientific publications, and indicate your * 00023 // * acceptance of all terms of the Geant4 Software license. * 00024 // ******************************************************************** 00025 // 00026 // $Id$ 00027 // 00028 // Hadronic Process: Nuclear De-excitations 00029 // by V. Lara 00030 00031 #include "G4PairingCorrection.hh" 00032 #include "G4SystemOfUnits.hh" 00033 00034 G4PairingCorrection* G4PairingCorrection::theInstance = 0; 00035 00036 G4PairingCorrection::G4PairingCorrection() 00037 { 00038 theCookPairingCorrections = G4CookPairingCorrections::GetInstance(); 00039 theCameronGilbertPairingCorrections = G4CameronGilbertPairingCorrections::GetInstance(); 00040 // theCameronTruranHilfPairingCorrections = G4CameronTruranHilfPairingCorrections::GetInstance(); 00041 } 00042 00043 G4PairingCorrection::~G4PairingCorrection() 00044 {;} 00045 00046 G4PairingCorrection* G4PairingCorrection::GetInstance() 00047 { 00048 if (!theInstance) { 00049 static G4PairingCorrection theCorrections; 00050 theInstance = &theCorrections; 00051 } 00052 return theInstance; 00053 } 00054 00055 G4double G4PairingCorrection::GetPairingCorrection(G4int A, G4int Z) const 00056 { 00057 G4double PCorrection = 0.0; 00058 G4int N = A - Z; 00059 if (theCookPairingCorrections->IsInTableThisN(N) && 00060 theCookPairingCorrections->IsInTableThisZ(Z)) 00061 PCorrection = theCookPairingCorrections->GetParingCorrection(A,Z); 00062 else if (theCameronGilbertPairingCorrections->IsInTableThisN(N) && 00063 theCameronGilbertPairingCorrections->IsInTableThisZ(Z)) 00064 PCorrection = theCameronGilbertPairingCorrections->GetPairingCorrection(A,Z); 00065 else { 00066 const G4double PairingConstant = 12.0*MeV; 00067 G4double Pair = (1 - Z + 2*(Z/2)) + (1 - N + 2*(N/2)); 00068 PCorrection = Pair*PairingConstant/std::sqrt(static_cast<G4double>(A)); 00069 } 00070 return std::max(PCorrection,0.0); 00071 } 00072 00073 00074 G4double G4PairingCorrection::GetFissionPairingCorrection(G4int A, G4int Z) const 00075 { 00076 const G4double PairingConstant = 14.0*MeV; 00077 G4int N = A - Z; 00078 G4double Pair = (1 - Z + 2*(Z/2)) + (1 - N + 2*(N/2)); 00079 G4double PCorrection = Pair*PairingConstant/std::sqrt(static_cast<G4double>(A)); 00080 return PCorrection; 00081 }